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' (N0 Model.)

A. M. LORYEA & '0. H. PALMER.

DYNAMO ELECTRIC MAGHINE.

Patented Jun 5,1883.

I UNITED STATES PATENT OFFICE.

ABRAM M. LORYEA AND CHARLES H. PALMER, OF NEV YORK, N. Y., ASSIGN- ORS, BY DIRECT AND MESNE ASSIGNMENTS, TO THE STAR ELECTRIC LIGHT AND POVER COMPANY OF UNITED STATES.

DYNAMO-ELECTRIC MACHINE.

SPECIFICATION forming part of Letters Patent No. 278,983, dated June 5, 1883.

I I Application filed October 4, 1882. (Nb model.)

To a. whom it may concern Be it known that we, ABRAM M. LORYEA and CHARLES H. PALMER, both of New York,

county and State of New York, have invented certain new and useful Improvements in Dynamo-Electric Machines, of which. the following is a specification.

This invention relates to improvements in the construction of the inducing or field mag- IO nets and the armatures of dynamoelectric machines and it has for its object to simplify and cheapen the construction as well as to in crease the effieiency of such machines. The

inducing or field magnets we make of two simi- 1 lar cast pieces of iron, bolted together at the neutral parts of the system, and form at these junctions the bearings for the journals of the armature-shaft, one-half of each bearing being in each of the similar east-iron pieces. The armature, secured on its shaft, is placed between the two castings before they are bolted together.

.Polar projections on the central parts of the castings surround the armature. This construction and arrangement, which virtually constitutes the principal working parts of the machine, insures perfect rigidity to the bearings of the armatureshaft, which is driven by means of a pulley secured to one of its ends projecting beyond the bearing. To further 0 compensate for the side wear of the bearings,

due to the tension of the driving-belt on the pulley, we provide means by which different parts of the bearings may from time to time be brought opposite such strain, so that all the 3 5 surface of the bearings shall be equally worn.

To this end j ournals are formed, projecting from the j oined ends of the two field-magnet castings,

concentric with the bearing of the armatureshaft. These journals are fitted in fixed stand 0 ard-bearings to support the machine and allow the field-magnets to be rotated on said journals to be set in any desired position. This movement of rotation applied to the field magnet system of a dynamo-electric machine also per- 4 5 mits of the proper adjustment of the magnets and collecting-brushes of the commutator relatively to each other, the brushes in this case being secured stationary to one of the stand- .ard-bearings.

panying drawings, in which- The improvements in the armature consist in building up the same of a number of thin fiat rings thoroughly insulated from one another by means of duplex washers formed of paper-board and felt, through which passes the rod for holding the rings together, said rods 5 5 being surrounded by a tube of non-conducting material; but to describe our invention more particularly we will now refer to the accom- Figure 1 is a front elevation. end elevation. Fig. 8 is a longitudinal section. Fig. 4 is a transverse section cut on the line x a, and Fig. 5 is an enlarged detached view of a portion of the armature.

a and a are two pieces of cast metal, similar in size and shape, each having polar projections a a at their central parts and semicircular disks of at their ends, provided with ears at their diameters, through which are passed the bolts b b, for securing the two pieces, a a, together, and insulated conductors c c are placed on them between the polar projections and the end disks.

The armatureshaft d is fitted to rotate in bearings formed at the junction of the two similar castings a. andva. One of its projecting ends is provided with the driving-pulley e, and the other one with the connnutator f, the plates of which are connected to the armature by means of wires passing under the sleeve f of the bearing in the ordinary manner. The projecting bosses forming the armature-shaftbearings are turned on the outside true and concentric with the shaft, thereby permitting the whole field-magnet system to be rotated on 8 5 said. bosses as they are supported in the stand; ard-bearings g and These standardbearings may be secured on any foundation in any desired manner, as they merely support the machine and do not govern or control. any of go the working parts. By this arrangement it will be seen that the bearings of the armature are very rigid, so that the armature is maintained in constant position in the magnetic field, and that said bearings may be turned round to present any surface to the side of the shaft under most pressure, due to the tension of the driving-belt on. the pulley c.

Fig. 2 is an 60 The collecting-brushes it h are carried by I as being similar may be provided with feet or the ring '1', secured to the standard-bearing by the bolts i '13. The relative position of the brushes and that of the magneticpolcs may be regulated by turning the magnets 11 a on their supporting bearings, the brushes being permanently held in position during such regulation. A series of holesare provided in the ring 1', by any adjoining two of which it may be held by the bolts i ito the standard. Irrepresents a collar for preventing end-play of the shaft (t in its bearing. The shaft may be shouldered at its journals for this purpose, if desired.

The construction of the armature is more clearly shown at Fig. 5, in which and the other views the thin flat iron rings 70 7c are shown. separated by means of washers composed of paper-board or similar material, Z, and felt I, \Ve apply the felt in this manner to prevent conduction of heat from one plate to another,

it being particularly well adapted for this purpose, and the paper-board part of the washers give stability to the same. At the same time they insure perfect electrical insulz'ttion be tween the rings.

The binding-rods m, which clamp and hold the rings and washers together, are placed inside of a tube, n, of paper or other insulating material, so that they in no wise interfere with the perfect insulation of the rings 7.. 7.: The cylindrical armature composed of the rings and washers is secured to the shaft 11 by means of the spider-arms 0 o. It maybe wound with wire, as shown, on the Gramme principle, or on any other known principle.

The end disks or plates, a, may be made any shape desired, )rovided tl .y have means for securing the two similar east pieces together to.form halved bearings for the journals of the armature-shaft.

if it is desired to construct a dynamo-elec trie machine according to our invention, leaving out the feature of rotating the whole magnetic system, then one of the pieces described base-pieces for the purpose of securing the in achine in place, and the other piece be secured thereto, as before described, having the armatare-shaft bearings between them.

\Ve do not claim, broadly, in this application a field-magnet composed of two pieces of metal secured together at the neutral. parts, in

connection with an armature-shaft journaled in bearings at said neutral parts, but reserve the right to make such broad claim, as well as claim to other patentable features not herein claimed, in a separate application, which we desire to be considered as a continuation of this application That we claim, and desire to secure by Letters .atent, is-

l In a dynamo-electric machine, field-mag nets provided with journals at the neutral parts concentric with the bearings in which the arinature-shatt rotates, in combination. with fixed standard-bearings, substantially as and for the purpose set forth.

2. In a dynamo-eleetrie machine, field-magnets provided with journals at the neutral parts concentric with the bearings in which 'the armature-slia'l't rotates, in combination with fixed standard bearings and. connnutatorbrushes secured to one of the stamlard-bearings, and adapted to bear on the commutator on the projecting end of the armature-shaft, substantially as and for the purpose set forth.

3. A ring-armature composed of thin iron rings, in combination with separating duplex washers, composed of paper-lmaul and felt, substantially as set forth.

In witness whereof we have hereunto set our hands, at New York, county and State of New York, this 2d day of October, A. l). 1882.

AB AM M. LORYEA. (JHi-XRLES H. PALMER.

in presence of- E. U. DELANEY,

If]. VAN ORDEN. 

